Error Analyzer

ChkOBD Error Code Analyzer

The ChkOBD Error Code Analyzer reads and decodes the Diagnostic trouble codes (DTC)  and displays them in the ChkOBD app screen.

The Diagnostic trouble codes (DTC) are automotive computer codes stored by the on-board computer diagnostic system (OBD) in your vehicle. There are hundreds of different codes for a Check Engine Light. That may sound scary but ChkOBD takes the guesswork out of the equation by showing you exactly why that Check Engine light came on and to be your guide in addressing the problem.

The Error Code Analyzer feature is sold as an “In-App” purchase with a one time fee of US$ 2.99. You get charged (one time) only if the app verifies that it can read, display, and delete the error codes  (..if you have any !!)  for your car.

Please remember that deleting the error code will not fix the problem that triggered that error code. But, it’s useful if your have fixed the problem or it is a temporary problem like a loose gas cap.

Even if you do need something repaired, it should be helpful knowing what to fix and going to the best repair place to fix that specific problem.

It should be to your advantage to ask for a quote to fix the exact identified problem rather than rely on a mechanic or estimator to be truthful. In the event a specialized specialized mechanic is needed to fix the error, you will know, in advance, whom to select. 

App Store
Play Store

Our software does require a compatible ODB Bluetooth Adapter to pass the codes to the ChkODB app. The ChkOBD software is compatible with a large selection of OBD adapters already present in the market.

These adapters connect with the OBD port (mechanically and electronically) and be able to connect to our applications via the Bluetooth wireless “standard”.

We have listed Adapters that have been tested with our application on the Adapters page.

If you have any questions about our products, do not hesitate to contact us via the “Contact Us or Support pages.

We would like to thank you for your interest in our products and hope you a very good user experience.

ChkOBD App Mockup
ChkOBD App Mockup
previous arrow
next arrow

Below is a list of the 20 most common OBD II trouble codes with the percentage of failures for Illinois vehicles tested in recent years:

  • P0420 – Catalyst System Low Efficiency – 13.2%
  • P0171 – Fuel Trim System Lean Bank 1 – 10.4%
  • P0401 – Exhaust Gas Recirculation (EGR) Flow Insufficient – 8.4%
  • P0174 – Fuel Trim System Lean Bank 2 – 6.8%
  • P0442 – Evaporative Emission (EVAP) System Small Leak Detected – 6.7%
  • P0300 – Engine Misfire Detected (random misfire) – 6.4%
  • P0455 – Evaporative Emission (EVAP) System Leak Detected (large) – 6.2%
  • P0440 – Evaporative Emission (EVAP) System – 5.5%
  • P0141 – Oxygen Sensor Heater (H02S) Performance Bank 1 Sensor 2 – 5.1%
  • P0430 – Catalyst System Low Efficiency Bank 2 – 3.2%
  • P0135 – Oxygen Sensor (HO2S) Performance Bank 1 Sensor 1 – 3.2%
  • P0446 – EVAP Vent Solenoid Valve Control System – 3.1%
  • P0128– Coolant Thermostat – 3.1%
  • P0301 – Cylinder 1 Misfire Detected – 3.1%
  • P0411 – EVAP System Control Incorrect Purge Flow – 2.8%
  • P0133 – Oxygen Sensor Slow Response Bank 1 Sensor 1 – 2.8%
  • P0303 – Cylinder 3 Misfire Detected – 2.6%
  • P0304 – Cylinder 4 Misfire Detected – 2.6%
  • P0302 – Cylinder 2 Misfire Detected – 2.6%
  • P0325 – PCM Knock Sensor Circuit – 2.1%

For a more complete list of the DTC error codes, please refer to this Delaware publication.